hmm... koreans write scripts very well which make they drama's full of passion, however, they put too much effort in their work that it almost make their dramas unrealistic, as a result, they make people live in fantasies and take their consciousness away from what is real which is not really good.

japanese dramas are exaggerated because they've grown in the anime world and as a result, they try to merge their anime concept and the reality which does not look really good.

i find taiwanese dramas fine and simple, not too much, not lacking either. just fine...

i can't choose one but if i have to ranked it, it would be:
1. korean - i just love how the way they shoot the scenes, the ost, everything!!!!
2. japanese - their adaptation of the manga or anime series is just so hilarious
3. taiwanese - i just love the way they make funny faces and their sound effects